My problem is that this refuses to converge, and gives me an NIntegrate::inumr error, due to the nested integral nature of the function. Furthermore, I cannot think of another definition for the function as it relies on the cube of an integral which has limits different from the limits of the total integrand, of which it is a part.

sorry, I meant to include that the variables are defined in my table, which is where the function's values are displayed.
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GokotaiDec 10 '12 at 20:01

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chrisDec 10 '12 at 20:15

You get that error because some or all of your variables don't have a numerical value. I don't know what you mean by saying that they are defined in your table, but apparently they weren't defined at the time of execution of the NIntegrate. Please provide more details about what you were doing.
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Sjoerd C. de VriesDec 10 '12 at 21:25

Hiya, thanks for that. I tried that as well and I still get an inumr error. Is that I've tried reversing the order of integration as well in desperation, but to no avail.
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GokotaiDec 10 '12 at 21:28

Make sure that both your rho function and Hubble function are defined in the following way: functionname[x_?NumericQ] := function goes here
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GuillochonDec 10 '12 at 22:33

Hiya, all my numbers have been defined in a previous cell, and I have a seperate cell that specifies my loops and/or iterators as part of the ParallelTable command.
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GokotaiDec 10 '12 at 22:48

Add ?NumericQ after each of the arguments in the declaration of Hubble and rho, as I described in my previous comment.
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GuillochonDec 11 '12 at 0:00

Hi Guillochon, I tried that too but now it gives me a different error - slwcon. I increased the working precision but it still does this. Any advice on how to circumvent this? Thanks for the tips by the way!
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GokotaiDec 11 '12 at 1:41

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